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6.12 Parallel Interface Frame Timing Requirements

See Section 11.1.3 for additional information

MIN

MAX

UNIT

tp_vsw

Pulse duration – default VSYNC_WE high

50% reference points

lines

tp_vbp

Vertical back porch (VBP) – time from the active edge of

VSYNC_WE to the active edge of HSYNC_CS for the first

active line(1)

50% reference points

lines

tp_vfp

Vertical front porch (VFP) – time from the active edge of the

HSYNC_CS following the last active line in a frame to the active

edge of VSYNC_WE(1)

50% reference points

lines

tp_tvb

Total vertical blanking – the sum of VBP and VFP (tp_vbp +

tp_vfp)

50% reference points

See (1)

lines

tp_hsw

Pulse duration – default HSYNC_CS high

50% reference points

128

PCLKs

tp_hbp

Horizontal back porch (HBP) – time from the active edge of

HSYNC_CS to the rising edge of DATAEN_CMD

50% reference points

PCLKs

tp_hfp

Horizontal front porch (HFP) – time from the falling edge of

DATAEN_CMD to the active edge of HSYNC_CS

50% reference points

PCLKs

(1)

The minimum total vertical blanking is defined by the following equation: tp_tvb(min) = 6 + [8 × Max(1, Source_ALPF / DMD_ALPF)]

lines

where:

•

SOURCE_ALPF = Input source active lines per frame

•

DMD_ALPF = Actual DMD used lines per frame supported

VSYNC_WE

HSYNC_CS

DATAEN_CMD

tp_vsw

1 Frame

tp_vbp

tp_vfp

HSYNC_CS

DATAEN_CMD

tp_hsw

1 Line

tp_hfp

tp_hbp

PDATA(23/15:0)

PCLK

n-2

n-1

(This diagram assumes the VSYNC

active edge is the rising edge)

(This diagram assumes the HSYNC

active edge is the rising edge)

Figure 6-7. Parallel Interface Frame Timing

DLPC3420

DLPS232 – OCTOBER 2021

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